What are the odds? Calculator lets you know chances of a snow day

It's the first question on many minds when a winter storm is on its way:

ARE WE GOING TO HAVE A SNOW DAY?

Now, that definitive answer lies in the minds of superintendents everywhere....but if you want to somewhat scientifically predict your chances of having a snow day, there some online tools you can use, for fun (really, just for fun, ok?).